Glibc abi compatibility

Glibc abi compatibility. Dec 8, 2020 · New port emulators/libc6-shim ABI-compatible glibc shim library A shim library providing limited glibc ABI compatibility on top of FreeBSD libc. Info. 31 vs 2. xxx' not found. Building on the oldest supported release (from the application point of view) is really the only way to do this. 1 Configuring and compiling the GNU C Library. As a workaround, configure without that option and build GCC as normal, then edit the installed <bits/c++config. Additional linking features can be plugged in as “passes” Easily decomposed and embedded: Supplement or replace system C library functionality easily. 29 Jun 25, 2023 · b. 27). GCC 4. Applications linked to the RHEL 7 version of a C++ library will not be able to use the RHEL 8 version of that library. This also includes any libraries that the program depends on, even libc”, and that the interceptors are just a workaround if one does not have an instrumented libc. 17 (on CentOS 7, which works fine) and 2. so. 7 open call may (very often) fail on RHEL5 or RHEL4. In the glibc 2. Use the new pip debug feature added in v19. – Feb 13, 2024 · If the compatibility issues persist and none of the aforementioned solutions work, an alternative is to statically link the application against GLIBC during the compilation process. x86_64 is x86_64-linux-musl. If you didn't find a library in the tracker please ask me to add it. ABI checker result (relative to 2. In the GCC 5. GNU C Library (glibc) is the standard library used on many distributions. Please let me know if there are any false positives The table below and notes which follow are a comparison of some of the different standard library implementations available for Linux, with a particular focus on the balance between feature-richness and bloat. Below is from a Ubuntu 15 machine. layout of structured types. If you break compatibility in glibc, you run the risk of having to adapt an enormous amount of software. 18, so it uses the same symbol versions). However, to my knowledge it is currently not possible to build glibc with clang, so my question ABI Laboratory. so against it and analyze the changes. The first one provides binaries linked with glibc and musl. The machine provides GCC 5. Re-entrancy of exit Oct 31, 2021 · We have Cary Coutant's agreement that after he converts generic-abi to Markdown and makes it open, RELR will be applied. When you try to build tensorflow, there is an prompt tell that you need to add “-D_GLIBCXX_USE_CXX11_ABI=0” flag, if you are using GCC 5 or higher, to keep the compatibility of your build tensorflow and official tensorflow build. ubuntu. e. Version Date Soname Change Log Backward Compat. 32 vs 2. 0, it means that for the wide streams in glibc, there is no requirement to provide vtable layout compatibility. python tag ‘py27 Apr 29, 2022 · "Yes, glibc has great ABI compatibility, but only one way. However, you should be able to build binaries for Ubuntu 21. 36). Roman Shaposhnik, What problems should I expect to encounter in the current preview release of Sun Studio for linux with respect to gcc & glibc & ABI compatibility? What are the recommended equivalent CFLAGS to something like "-O2 -march=i686 -pipe -fomit-frame-pointer" for compatibility. > This breaks all the games running via Proton that are using EAC. ". Finally, glibc’s regex uses a 32-bit regoff_t even on 64-bit archs. The default is 'c Sep 21, 2021 · RHEL6, RHEL 7 and RHEL 8 define various levels for library compatibility across current and future versions of the distribution. 34 continues to improve support for Linux syscalls by adding both evecveat and close_range. Nov 17, 2017 · If you use only libraries with Tier 1 ABI compatibility, your application will continue to run on Red Hat Enterprise Linux 7 without recompilation. [+] struct __pthread_mutex_s (1) Change. 25 ABI compatibility with gcc’s libstdc++ for some low-level features such as exception objects, rtti and memory allocation. Tracker / glibc. You must build it in a separate build directory. Apr 18, 2022 · 1. zig cc -target x86_64-linux-gnu. All of them are shared on GitHub . Software compatibility, patches and Dec 11, 2023 · (In general, Linux is an ecosystem where people are assumed to have compilers, and to be able to recompile software to be binary-compatible with their local distro -- unlike Windows where everything is distributed as binaries so ABI compatibility, rather than source compatibility, is critical). This field may be incorrectly initialized or accessed by applications. GLIBC_ belongs to glibc, and GLIBCXX_ to libstdc++. There will be small changes in how everything is glued together, for lack of better words, and ensuring library compatibility can be tricky, especially when Feb 22, 2023 · The --with-default-libstdcxx-abi=gcc4-compatible configure option is broken in the 9. Newer versions of GLIBC will contain multiple copies of functions covering older versions that had different parameters and/or returns. 33, whereas 21. 1 and 9. Oct 8, 2020 · A: The system compiler on RHEL 8 uses a new ABI for C++ code, which is different from the ABI used by the RHEL 7 system compiler. min_runtime_abi and max_runtime_abi specify the Sep 28, 2023 · Enable DT_RELR (all architectures) to allow packing of relative relocations in a binary. --enable-cheaders=OPTION. Mar 22, 2016 · If I am parsing the Dual ABI page correctly, it looks like a matter of pivoting on _GLIBCXX_USE_CXX11_ABI and abi::cxx11 with some additional hardships. With libraries and version differences, you usually run into soname issues (library version requirements). abidump. Glibc is at the heart of nearly all gnu/linux distributions and if glibc breaks compatibility, software is lost. A tool for checking backward binary and source-level compatibility of a C/C++ library. Modified 4 years, 8 months ago. 27. It also added both gettid, tgkill, and getcpu to keep in sync with Linux syscalls. Binary compatibility is much more limited, but it will steadily increase with new versions of musl. Suppose that I have a program that relies on a newer glibc version that is not available in the system via packages. Linux syscalls ABI is stable. POSIX 2008 API coverage (obsolete STREAMS and posix_trace APIs are not included) C99 API coverage; C11 API coverage (optional annex K is not included) Compatibility with other implementations. Apr 2, 2020 · Step 3: Compare ABI changes. Dec 31, 2015 · The C and C++ ABI changed in GCC 4. Your API defines the order in which you pass arguments to a function. 1 releases. 7. The RHEL 7 versions of C++ libraries use the old ABI, and the RHEL 8 versions use the new one. Applications that want to use the rseq facility can use these ABI symbols to Jul 15, 2021 · Linux support. Unless the source is interpreted, you usually need to build binary packages separately for different versions of Ubuntu. How exactly a system might break by updating glibc? Ask Question. 6 on. This also works for C++ too using zig c++. 5. 28. so I take it is expected from tools to handle this on GNU Linux environments. These correspond to the source directory's include/c, include/c_std, and include/c_global, and may also include include/c_compatibility. 04 from the source code. Your ABI defines the mechanics of how these arguments are passed (registers, stack, etc. glibc vs. This option can change the library ABI. Tracker / glibc / 2. The application binary interface implemented by a C or C++ compiler affects code generation and runtime support for: size and alignment of data types. ABI Compliance Checker — a tool for checking backward API/ABI compatibility of a C/C++ library: abi-compliance-checker -lib NAME -old OLD. Tje glibc 2. And software should never be lost, even if it's older then 16 years. *\$', what uses the equivalent of strings -a <file> | fgrep '@(#)', neither of which determine version information of the underlying library if those strings are not compiled in. The GNU C Library cannot be compiled in the source directory. The GNU C++ compiler, g++, has a compiler command line option to switch between various different C++ ABIs. g. 10 uses glibc 2. 26 Recommended Tools for Compilation. The ABI sonames (e. This involves including the entire GLIBC library within the resulting executable, eliminating the need for external dependencies. ABI Compatibility Status. libLoL (LoongArch on LoongArch) is a compatibility runtime for applications designed for LoongArch's old-world ABI. May 18, 2010 · Using zig cc as your compiler, it's possible to target a specific version of glibc. Update: the TSC has decided that it is better to approach this problem as a documentation issue. GNU 'binutils' 2. There may well be other cases of configure triplets and --with-fp / --without-fp options accepted by configure, but they are unlikely actually to work. Problems with Data Types, Medium Severity (1) pthreadtypes. This questions are for Mr. However, distributing AI/ML-related Python packages and ensuring application binary interface API/ABI changes review for glibc . Aug 8, 2022 · This breaks SysV ABI compatibility and all the tools. For example, if you have unpacked the GNU C Library sources in /src/gnu/glibc-version , create a directory /src/gnu/glibc-build to put the object files in. In particular: The option -mms-bitfields is enabled by default, which means the bitfield layout follows the convention of the Microsoft compiler. glibc-2. Overview# The tag format is {python tag}-{abi tag}-{platform tag}. These details are defined as the compiler Application Binary Interface, or ABI. glibc supports the following (architecture, ABI) combinations, with dynamic linker names as indicated. Jun 5, 2019 · After discussing it with him, I'd like to propose that glibc add a new function: void gnu_get_libc_abi_levels(int *build_abi, int *min_runtime_abi, int *max_runtime_abi) Basically this is a function that returns 3 integers. Nov 4, 2016 · However it improves source compatibility going forwards, since as new operating systems are added this file will be updated, instead of the change having to be made in multiple open-source projects. Relying on the ABI information makes a lot more sense if you're trying to determine compatibility, as 13. By and large, these are applications built for Loongson's Loongnix reference Linux distribution and UnionTech's UOS, consisting mostly commercial applications designed for the mainland Chinese market, such as: Tencent's QQ for Linux. 24. The problem is extremely pernicious to debug, even with full source code and debug symbols, because Pth's Mar 17, 2021 · According to the documentation, musl has a stable ABI, and maintains backwards compatibility [musl-compatibility] [compare-libcs], so a binary compiled against an earlier version of musl is guaranteed to run against a newer musl runtime [musl-compat-ml]. Python has become a popular programming language in the AI/ML world. It takes the form [arch]-linux-musl[abi_modifiers]. Releases happen every 6 months around 1st February and 1st August, subject to any regressions or ABI issues. Linux Binary Compatibility. Aug 26, 2021 · It should be hopefully clear that there is no such thing as a “glibc based alpine image” because Alpine does not use glibc, it uses musl. Conformance to the same ABI and the same behavior of implementation-defined features are both relevant for compatibility. 35 upstream version, we solved this coordination problem by exposing three new symbols: __rseq_size, __rseq_flags, __rseq_offset as part of the glibc ABI (Application Binary Interface). , libc. For a user who only uses one C++ standard library, such as libc++, there are typically three compatibility ABI Laboratory. Exact release dates for future releases are decided by consensus and are tracked in their respective release pages. Internal linker model can be dumped/read to textual format. Functional differences from glibc; Comparison with other Linux libc implementations. I have tried to be fair and objective, but as I am the author of musl, that may have influenced my choice of which aspects to compare. Whether building your own or downloading binaries, you need to select the appropriate GCC-style tuple for the architecture/ABI you want to target. Standards compatibility tables. 32. Effect. The static linker option provides objects with only one kind of hash section. Design and Implementation: Extensive unit tests. Most libraries either provide a C interface (which generally has less issues with ABI compatibility than C++), provide source code (expecting the user to build it themselves with the compiler they want to use), or provide pre-built shared libraries for specific compiler versions. Musl is used on some distributions like Alpine Linux. Apr 5, 2018 · There were the --abi tags cp27m and cp27mu for python 2 to distinguish between ucs2 and ucs4 unicode build flags. Share. > that use DT_HASH for symbol lookup. But for real interoperability of C++ shared libraries and C++ programs, not Basically everything in the Linux system depends on glibc, or depends on something that, in turn, depends on glibc. Type of field __spins has been changed from int ( 4 bytes) to short ( 2 bytes). 2, but it's a dangerous hack; you would be far better off if at all possible to ask your vendors to ship libraries compiled with the C++03 ABI (-D_GLIBCXX_USE_CXX11_ABI=0) or to upgrade to GCC 5 or above. This allows the user to define the approach taken for C header compatibility with C++. 34, which are not completely compatible. 37: 2023-02-01: 0/1/2/6: changelog ABI Compliance Checker. abidump files are ABI dumps of OLD and NEW library versions generated by the ABI Dumper tool. A brief summary is available by running info libc. 8. Nov 19, 2021 · 13. Extensive unit tests. 23 was released 18 Feb 2016 and gcc-6 was under development at that time, so glibc-2. Relevant github issue. It's eglibc, though (it aims to be binary-compatible with glibc 2. so, libc++, libc++abi => a. 30 added the getdents64 function, used on mainly by libraries to access that access the filesystem. In addition, since wide/wchar_t support was added to the GCC-internal copy of libio in GCC 3. Jul 31, 2017 · It's possible to use the C++11 ABI with gcc 4. 32 / libpthread Sep 27, 2019 · Python wheels, AI/ML, and ABI compatibility. Because the developers of both the Linux kernel and glibc are committed to maintaining ABI compatibility, virtually all of the details provided in TLPI should remain accurate in the future. Application binary interface (ABI) An ABI is a set of runtime conventions that interact with a compiled binary representation of a program. If that's the case then why is it so hard to persuade unstable nixos that maybe it should be using the latest version? ABI Laboratory. FreeBSD provides optional binary compatibility with Linux®, commonly referred to as Linuxulator, allowing users to install and run unmodified Linux binaries. ). 18 symbol has the most recent version number among the symbols listed, and the library version is indeed 2. *. Editing the wiki C. Sometimes, a program written on one version of glibc may not work on another version due to changes in the API. 04, which breaks our software). The ones interesting for manylinux are: Compatibility level 1: APIs and ABIs are stable across three major releases Compatibility level 2: APIs and ABIs are stable within one major release The libraries listed in the legacy (i. The last point was an observation that creating a 'nice' wrapper for LibC or a cleaned up POSIX Dec 15, 2023 · It can also be accessed by running info libc or man libc, or by looking at /usr/share/doc/glibc/, or similar directories on your system. com> Reviewed by: ericbsd Chapter 12. 5 hello. And it gives: version `GLIBC_2. Thus, users will be able to get a glibc with many bugfixes from mainline (compared to the "main release" 2. build_abi specifies the "ABI level" of binaries built against this glibc. Therefore, we use a scheme similar to the glibc-version-based manylinux tags, but against Aug 2, 2021 · The ABI sonames (e. Projects like TensorFlow and PyTorch have Python bindings as the primary interface used by data scientists to write machine learning code. This means that for vtable compatibility, only architectures which were supported by GCC 2. 2 releases, producing a shared library with missing symbols (see Bug 90361). The current glibc binary rpms are already built this way e. 0. More reading is available on Red Hat's blog at GCC5 and the C++11 ABI and The Case of GCC-5. Some bootloaders etc. Mailing lists. abidump -new NEW. Normally, if you want to link a library using libstdc++ into an executable using libc++, the best way is to ensure that the library only exposes C and C++ extern "C" symbols. 0 and GCC 3. Jun 30, 2021 · In the past, this worked perfectly well with the POSIX shell implementation because it got intepreted by whichever /bin/sh was available. Synopsis. Now that we have a reference ABI, we just need to compare newer versions of libslicksoft. C++ ABI change in std::string and std::list. Alex_Blewitt (Alex Blewitt) November 9, 2016, 6:58pm 1. Binary compatibility report for glibc: 2. Windows doesnt need a new build of standard dlls like glibc equivalent for every distro etc. Oct 13, 2012 · Detecting ABI compatibility issues with GCC. 5. About Tracker Navigator Open-Source Reports Contacts. Asked 4 years, 8 months ago. The second provides binaries linked with musl For example, we see python_abi and libgcc_mutex in the conda-forge output; detailed compiler, BLAS interface, CPU architecture and library info in the Spack output; and glibc version info in the Arch Linux output. 22 or later. (The change failed to make it Mar 18, 2024 · Lastly, compatibility issues can also arise when using glibc. Unfortunately this means that GCC 3. 04 uses glibc 2. 28 / libpthread-2. 2. The main point of the GCC 3. Added Symbols Removed Symbols; 2. Although out of scope for phase 1, something that keeps cropping up in a variety of Linux/Darwin Swift scripts is the conditional inclusion of Darwin or GlibC per platform. So you can include it for executable or statically link only libc (and only glibc do not officially support static linking). glibc is just another library and Linux also has a choice for replacing it. typically if you want to go newer than those, glibc will generally work with the version of gcc that was in development at the time of the release. Dual ABI. ABI List. com, 21. The ABI is compatible on 32-bit. Aug 19, 2022 · It is fair to say that some projects are rather more concerned about preserving ABI compatibility than others; the GNU C Library (glibc) project stands out even among those that put a lot of effort into preserving interface stability, So it may be a bit surprising that a recent glibc change is being blamed for breaking a number of applications, most of which are proprietary games. The creation of fully static binaries without license implications. API および ABI は、メジャーリリースのライフサイクル期間内で安定します。. e. Jun 16, 2020 · I'm 100% sure that either our use of Pth, or Pth itself, is dependent upon a bug or an incompatible change introduced into glibc between version 2. Dec 22, 2022 · Therefore, applications need to reuse the glibc-managed rseq area. PR: 250591 Submitted by: Alex S <iwtcex@gmail. h. 1 release libstdc++ introduced a new library ABI that includes new implementations of std::string and std::list. For example, to target glibc 2. Feb 6, 2011 · Though, many developers criticize the development-style of glibc and so non-technical reasons may favor eglibc over glibc. However, (a few) new features are added to the kernel and glibc with each release. The new Glibc is (or at least is supposed to be) ABI compatible though. 2 to see more tag related info. At present, some glibc-linked shared libraries can be loaded with musl, but all but the simplest glibc-linked applications will fail if musl is dropped-in in place of /lib/ld-linux. 0, which means in general you can't link together binaries compiled with this version of the compiler and with versions before GCC 4. pre-perennial manylinux) policies Here you can find daily API/ABI changes analysis reports for most popular C, C++ and Java libraries. 7 requires #define O_CLOEXEC 02000000 /* set close_on_exec */ This means that a glibc 2. Other C Libraries Apr 27, 2012 · ident does the loose equivalent of a strings -a <file> | grep '\$. This explicit version switch is the flag -fabi-version. ABI は、リリース後のメジャーリリース Oct 31, 2021 · We have Cary Coutant's agreement that after he converts generic-abi to Markdown and makes it open, RELR will be applied. The source code of the tracker is open, so you can setup your own local tracker for a library and share reports with others. 28 vs 2. The Application Binary Interface (ABI) of the std::string and std::list classes from the libstdc++ library changed between RHEL 7 (GCC 4. This is non-conforming to POSIX and precludes giving correct output for strings larger than 2GB. 33 Mar 4, 2020 · GLIBC_ and GLIBCXX_ symbol versions have no intrinsic relationship. Updated in 2023-11. The official TensorFlow packages are built with GCC 4 and use the older ABI. 8) and RHEL 8 (GCC 8) to conform to the C++11 standard. There is no impact to ABI compatibility, since this proposal is additive. Options are c, c_std, and c_global. 27 vs 2. The main ones are Add GLIBC_ABI_DT_RELR for DT_RELR support and elf: Support DT_RELR relative relocation format [BZ #27924]. 7 or newer. 2 is incompatible with GCC 3. 1. ABI Compliance Checker (ABICC) is a tool for checking backward binary and source-level compatibility of a C/C++ library. 24 vs 2. We can use Libabigail's abidiff program to compare the two library versions. to the top. Viewed 3k times. c -o hello. In 2022-04, DT_RELR changes finally landed in glibc (milestone: 2. ABI Laboratory. 37: 2023-02-01: 0/1/2/6: changelog Jul 27, 2018 · @Tones, in short, it maintains the ABI, application binary interface, compatibility. libstdc++ can be built against many different glibc versions, and this can result in different GLIBC_ version references, but the set of GLIBCXX_ versions is not changed by that. 17 is maintained by Carlos O'Donell. musl uses a correct type, but this renders the ABI of the regex functions incompatible on 64-bit archs. 1 and the Two C++ ABIs. Feb 1, 2023 · API/ABI changes review for glibc . In order to maintain backwards compatibility for existing ABI Laboratory. 26 This is a list of my open-source tools for analysis of backward binary compatibility and source compatibility for C/C++ and Java libraries, visualization of changes in the source code and generating of automated smoke tests. Linux distros are usually tied to a specific version of GCC (only ABI Laboratory. Mar 13, 2024 · Platform compatibility tags# Platform compatibility tags allow build tools to mark distributions as being compatible with specific platforms, and allows installers to understand which distributions are compatible with the system they are running on. musl libc (muslc) is a new C library aiming to be lightweight, fast, simple, free, (annoyingly) correct. ABI compatibility doesn't mean that everything has to stay the same, it just means that the documented interface (functions and structures) doesn't change (or there are only additions - that can be done in a backwards compatible way with a proper design). 2 release is to have a relatively stable and common C++ ABI for GNU/Linux and BSD usage, following the Itanium C++ ABI. (The change failed to make it Description of problem: RHEL4/5 has the following flag definition #define O_ATOMICLOOKUP 02000000 /* do atomic file lookup */ while glibc 2. 4. The glibc 2. Apr 6, 2021 · The issue isn't -Ofast per-se, that is common to all gcc/g++ versions from 4. It allows loading shared objects compiled on Linux and dynamically linked to glibc into native FreeBSD processes. The kernel clearly shows it's possible to upgrade without breaking ABI, so that is a damn bad excuse. 34, the shared objects are installed under their ABI sonames directly, without symbolic links. 32 Feb 24, 2019 · Background. Here's the command to invoke abidiff : abidiff baseline. To avoid compatibility issues, it is important we test programs thoroughly on different versions of glibc before deploying them. These changes were necessary to conform to the 2011 C++ standard which forbids Copy-On-Write strings and requires lists to keep track of their size. 6) were provided as symbolic links. 18. In general, the more dependencies and more languages one uses, the more ABI compatibility starts to matter. Those are no longer relevant in python 3 though. It is available for the x86 (both 32 and 64 bit) and AArch64 architectures. 互換性レベル 1. We will therefore try to identify common scenarios, including using the glibc package, that cause stability Red Hat Enterprise Linux にあるコンポーネントおよびパッケージはすべて、次の 4 つの互換性レベルのいずれかに分類されます。. GLIBC_ABI_DT_RELR, and tooling must support it already. From GCC version 3 onwards the GNU C++ compiler uses an industry-standard C++ ABI, the Itanium C++ ABI . 16): CPU \ Kernel : GNU/Linux : Oct 26, 2022 · A Common C++ ABI for GNU/Linux. I recently spent a fairly substantial amount of time tracking down a problem that turned out to be caused by compiling a library with -D_GLIBCXX_DEBUG (which tells libstdc++ to use a debug version of the standard library with extra checks) but compiling the client program without. Attachments. The tool analyzes changes in API/ABI (ABI=API+compiler ABI) that may break binary compatibility and/or source compatibility: changes in calling stack, v-table changes, removed symbols, renamed fields Aug 28, 2006 · 807575 Aug 25 2006 — edited Aug 28 2006. 12. may need adjustment due to missing DT_RELR support in self-relocation. icheck - C interface ABI/API checker: Jan 31, 2010 · The ABI defines the structures and methods that your compiled application will use to access the external library (just like the API did), only on a lower level. The GNU C Library has the following core mailing lists: libc-help for general user help and discussion. Linus Torvalds ranted about this on DebConf 2014; you can easily find the video on youtube. API and ABI compatibility between eglibc and glibc disallow big changes and all x86-64 optimizations are probably merged into glibc, too. Some Linux-specific operating system features are not Mar 21, 2014 · Note how the GLIBC_2. The libstdc++ library supports both the old and new ABI, but some other C++ system libraries do not. 23 will work with Nov 9, 2016 · Evolution Discussion. 1. This is useful to get consistent math precision across systems, or updated memory operations for newer microarchitectures. 27 (on Ubuntu 18. . You could also attempt to use strings to find out something about it. python tag ‘py27 The release branch of glibc-2. The API is enforced at compile time and determines source compatibility, that is, whether application source code will compile similarly across different instances of the operating environment. abi path/to/new-binary. 2. As a Jul 31, 2023 · Different compatibility modes (selectable when you compile an application) allow the peaceful coexistence of compatibility support for different varieties of Unix. Jun 18, 2019 · - Super User. These pieces will work on Linux, MacOS, Windows, and Fuchsia. For example, ARM is arm-linux-musleabi for standard soft-float EABI and arm-linux-musleabihf for the hard-float variant. What applications are compatible with musl? Aug 28, 2006 · What problems should I expect to encounter in the current preview release of Sun Studio for linux with respect to gcc & glibc & ABI compatibility? What are the recommended equivalent CFLAGS to something like "-O2 -march=i686 -pipe -fomit-frame-pointer" for Sun Studio in linux? Mar 24, 2023 · Hi everyone, the documentation of the memory sanitizer states that “MemorySanitizer requires that all program code is instrumented. 25 vs 2. ## Effect on ABI stability. out. 95 need to be considered. However, the Go implementation, can run into ABI compatibility issues because binaries built on newer toolchains aren't meant to be run against older runtimes. This increases compatibility with distribution package managers that delete removed files late during the package upgrade or downgrade process. According to packages. Starting with glibc 2. h> headers to define the _GLIBCXX_USE_CXX11_ABI macro to 0 . rq bv ep ix rc sb ad nx eu fr